RSFKL RFG Equivalent & Substitute Parts

Part Overview

The RSFKL RFG is a general-purpose fast recovery rectifier diode rated for 800 V DC reverse voltage and 500 mA average rectified current. Manufactured by Taiwan Semiconductor Corporation, this surface mount diode is designed for applications requiring fast switching characteristics with a reverse recovery time of 500 ns. The device is housed in a DO-219AB (Sub SMA) package and operates across a junction temperature range of -55°C to 150°C. The part maintains active product status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent substitute parts are necessary to address supply chain flexibility, alternative packaging formats, and automotive-grade qualification requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value	Unit
Voltage - DC Reverse (Vr) (Max)	800	V
Current - Average Rectified (Io)	500	mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA	V
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Reverse Recovery Time (trr)	500	ns
Current - Reverse Leakage @ Vr	5	µA @ 800 V
Capacitance @ Vr, F	4	pF @ 4V, 1MHz
Package / Case	DO-219AB	—
Mounting Type	Surface Mount	—
Operating Temperature - Junction	-55 to 150	°C
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the RSFKL RFG is determined by strict equivalence across the following electrical and mechanical parameters:

Critical Matching Parameters:

Voltage - DC Reverse (Vr) (Max): 800 V
Current - Average Rectified (Io): 500 mA
Package / Case: DO-219AB
Mounting Type: Surface Mount
Operating Temperature - Junction: -55°C to 150°C
Speed Classification: Fast Recovery ≤ 500ns, > 200mA (Io)

Compliance Parameters:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)
REACH Status: REACH Unaffected

All three substitute parts (RS07K-GS08, RS07K-GS18, RS07K-HM3-08) manufactured by Vishay General Semiconductor - Diodes Division meet these core electrical specifications and compliance requirements. Differences exist only in packaging format (Cut Tape & Digi-Reel® versus Tape & Reel) and automotive-grade qualification (AEC-Q101), which do not affect functional equivalence in standard applications.

Parameter Comparison

Parameter	RSFKL RFG	RS07K-GS08	RS07K-GS18	RS07K-HM3-08
Manufacturer	Taiwan Semiconductor Corporation	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division	Vishay General Semiconductor - Diodes Division
Voltage - DC Reverse (Vr) (Max)	800 V	800 V	800 V	800 V
Current - Average Rectified (Io)	500 mA	500 mA	500 mA	500 mA
Voltage - Forward (Vf) (Max) @ If	1.3 V @ 500 mA	1.3 V @ 1 A	1.3 V @ 1 A	1.3 V @ 1 A
Speed Classification	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)	Fast Recovery ≤ 500ns, > 200mA (Io)
Reverse Recovery Time (trr)	500 ns	300 ns	300 ns	300 ns
Current - Reverse Leakage @ Vr	5 µA @ 800 V	2 µA @ 800 V	2 µA @ 800 V	2 µA @ 800 V
Capacitance @ Vr, F	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz	4 pF @ 4V, 1MHz
Package / Case	DO-219AB	DO-219AB	DO-219AB	DO-219AB
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Operating Temperature - Junction	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active
Packaging Format	Sub SMA	Cut Tape (CT) & Digi-Reel®	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®
Automotive Qualification	—	AEC-Q101	AEC-Q101	AEC-Q101

Engineering Selection Recommendations

All three substitute parts are functionally equivalent to the RSFKL RFG for applications requiring 800 V, 500 mA fast recovery rectifier diodes in DO-219AB surface mount packages. Selection among the substitutes is based on the following criteria:

RS07K-GS08 (Vishay): Suitable for applications requiring Cut Tape & Digi-Reel® packaging format. Includes AEC-Q101 automotive qualification. Inventory availability: 50,300 pieces.

RS07K-GS18 (Vishay): Suitable for applications requiring Tape & Reel (TR) bulk packaging format. Includes AEC-Q101 automotive qualification. Inventory availability: 50,802 pieces.

RS07K-HM3-08 (Vishay): Designated as eSMP® series variant with Cut Tape & Digi-Reel® packaging format. Includes AEC-Q101 automotive qualification. Inventory availability: 12,200 pieces.

All substitute parts maintain ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity level (MSL 1). The Vishay substitutes demonstrate improved reverse recovery time (300 ns versus 500 ns) and lower reverse leakage current (2 µA versus 5 µA), representing enhanced performance characteristics within the same electrical rating envelope. Selection should be based on packaging requirements and supply chain availability rather than electrical performance, as all parts satisfy the core 800 V, 500 mA specification.

Frequently Asked Questions (FAQ)

Q: Can RS07K-GS08, RS07K-GS18, and RS07K-HM3-08 be used interchangeably with RSFKL RFG?

A: Yes, all three Vishay parts are parametric equivalents for the RSFKL RFG. They share identical voltage ratings (800 V), current ratings (500 mA), package type (DO-219AB), and operating temperature range (-55°C to 150°C). The primary differences are packaging format and automotive qualification, which do not affect functional compatibility in standard applications.

Q: What is the difference between the three substitute parts?

A: The three substitutes differ only in packaging format. RS07K-GS08 and RS07K-HM3-08 are supplied in Cut Tape & Digi-Reel® format, while RS07K-GS18 is supplied in Tape & Reel (TR) format. RS07K-HM3-08 is designated as part of the eSMP® series. All three carry AEC-Q101 automotive qualification. Electrical specifications are identical across all three parts.

Q: Do the substitute parts have better performance than the RSFKL RFG?

A: The Vishay substitute parts demonstrate improved reverse recovery time (300 ns versus 500 ns) and lower reverse leakage current (2 µA versus 5 µA). However, both the original part and substitutes meet the fast recovery classification (≤ 500ns, > 200mA). These differences represent enhanced performance characteristics but do not affect functional equivalence for applications designed around the RSFKL RFG specifications.

Q: Are all parts RoHS compliant?

A: Yes, the RSFKL RFG and all three substitute parts are ROHS3 compliant and REACH unaffected. All parts carry unlimited moisture sensitivity level (MSL 1).

Q: Which substitute should I select for automotive applications?

A: All three Vishay substitutes carry AEC-Q101 automotive qualification. Selection should be based on packaging requirements: RS07K-GS08 or RS07K-HM3-08 for Cut Tape & Digi-Reel® format, or RS07K-GS18 for Tape & Reel format.

Q: Can I use these parts in high-temperature applications?

A: Yes, all parts operate across the same junction temperature range of -55°C to 150°C, supporting both high-temperature and low-temperature applications within this specification.

Q: What is the difference between Sub SMA and DO-219AB packaging?

A: Sub SMA is the supplier device package designation for the RSFKL RFG, while DO-219AB (SMF) is the standard package classification used by Vishay for the substitute parts. Both designations refer to the same physical package type and are mechanically and electrically compatible.

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